Attaching cords to window-sash



UNITED sTATns PATENT OFFICE.

PORTER A. GLADWIN, OF PAVVTUCKET, MASSACHUSETTS.

ATTACHING CORDS TO WINDOW-SASH.

Speccaton of Letters Patent No. 23,675, dated April 19, 1859.

To all whom it may concern:

Be it known that I, PORTER A. GLADwIN, of Pawtucket, county of Bristol, and State of Massachusetts, have invented certain new and useful Improvements in Graduating and Tension Attachments for Spring-Pulleys for I/Vindow-Sashes; and I do hereby declare that the same is described and represented in the following specification and drawings, and to enable others skilled in the art to make and use the same I will proceed to describe the construction and operation, referring to the drawings, in which the same letters indicate like parts in each of the figures.

The nature of my improvement consists in attaching a spring to the edge of the sash, and securing the cord thereto, so that the tension of the spring pulley will also pro duce the side wise tension of the sash springs against the jamb of the window, and thereby equalize, or graduate the action of the spring pulley.

In the accompanying drawings, Figure l, is a sectional view. Fig. 2, is a side view.

A, represents the jamb of the window frame.

B, represents the stile of the sash.

C, shows one of Dana Bickfords patent spring pulleys for window sashes.

D, shows the tension spring, curved and slotted at one end, in such a manner as to allow the curved port-ion to project beyond the line of the cord and press against the amb.

pleasure.

F, is a groove washer through which the end of the cord G is secured and is made to iit the slot in the curved end of the spring D, so as to prevent cutting the cord. Now by the use of this attachment to, or with the spring pulleys of said Bickford or others, to which they may be applicable, I am enabled to remove serious objections to the use of said pulleys, such as the necessity of always fastening the sash to keep it where it may be desirable. The liability of breaking the spring consequent from sudden jerkswhich without the use of some tension is very liable-and which by the use of this improvement is entirely removed, and which also may be said to be among the advantages which are to be derived by the use thereof, over others now in use.

The window sash may be raised and lowered when desirable, without creating any jerk upon the window, and will retain its position wherever it may be left, thereby securing a free and equal motion to the action of the spring pulley, removing all liability of breaking and getting out of order.

Thus, and not the least to be considered, is making the use of the spring pulleys for window sashes far more useful and desirable.

I do not rely upon aspring acting as such-independent of the cord attached thereto, nor do I wish to claim it; but

The employment of the slotted tension spring, or plate D in combination with the cord G and pulley C, in the manner as and for the purpose described.

PORTER A. GLADWIN. |:L.s.]

Witnesses:

CALVIN II. FARNHAu, JEREMY W. BLISS. 

